<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {
            width: 100px;
            height: 100px;
            background-color: red;
            border: 13px solid bisque;
            padding: 10px;
            margin: 10px;
            /* box-sizing: content-box; 默认*/
            /* box-sizing: border-box; 怪异*/
        }

        /* 
        w3c标准: width: brder+pading+margin+ content  box-sizing: content-box
        ie怪异: width  box-sizing: border-box;
         */
    </style>
</head>

<body>
    <div></div>
</body>

</html>